1. The problem statement, all variables and given/known data A sprinter reaches his top speed of 11m/s in t seconds from rest with essentially constant acceleration. If the maintains this speed once reached and covers the 100m distance in 11.5s, Find: a) the time it took to accelerate. b) his acceleration until he reaches constant speed. 2. Relevant equations Vf^2 = Vi^2 + 2ad d = Vi(t) + 1/2at^2 Vf = Vi +at 3. The attempt at a solution I can't figure out how to do this without a least one more variable given. If I try to use Vf^2 = Vi^2 + 2ad I am missing the acceleration and the distance it accelerates for. If I try to use d = Vi(t) + 1/2at^2 I am missing the distance, acceleration, and the time. If I try to use Vf = Vi +at I am missing the acceleration and the time. I don't really know where to even start, I cant find any questions online that are the same as this one. They usually give you the distance travelled before acceleration stops or how long it took. This is very confusing to me.